The A38(M) runs from the
A5127 through
Gravelly Hill Interchange where the A38 joins and then shortly after traffic from the
M6 motorway also joins. It then enters a
tidal flow section. The road is on a
viaduct as it passes through
Aston; this section cuts through the grounds of
Aston Hall. The road passes through its first junction after . It enters a cutting before reaching the second junction, where the tidal flow ends as does the motorway. The motorway is curved in Aston to avoid an
Ansells brewery. The motorway was also crossed by a
vinegar pipeline, carrying the condiment from one part of the since-demolished
HP Sauce factory to the other. The traffic island at Dartmouth Circus was built where Aston Road met with Dartmouth Street, Bracebridge Street and Allesley Street. where the White Hart public house had been sited. Other than the A38(M) Aston Expressway, the circus also has exits to: •
A4540 (ring road) east, Dartmouth Middleway (previously Dartmouth Street) • A4540 (ring road) west, Newtown Middleway •
A38 south, upper Commercial Street (leads to
St Chads Queensway) •
A5127 north, Aston Road (leads to Lichfield Road) at Dartmouth Circus, the southern end of the A38(M) The traffic island at Dartmouth Circus preserves a re-erected
Boulton and Watt steam engine (). The engine was built in 1817 and used in
Netherton at the ironworks of
M W Grazebrook. ==Tidal flow==